HUAYUAN SLG-200HF, Manual Instruction, Page: 14 / 53

7
3. Requirements of gas supply
Requirement of gas quality, pressure and flow
Gas Quality Pressure Flow
O
2
Purity ≥99.5% (Suggest using liquefied gas)
Clean, dry and oil-free
0.5MPa
～
0.7MPa ≥70 L/Min
N
2
Purity ≥99.9% (Suggest using liquefied gas)
Clean, dry and oil-free
0.5MPa
～
0.7MPa ≥195L/Min
AIR Clean, dry and oil-free 0.5MPa
～
0.7MPa ≥190L/Min
Note
：
The Air in above table should accordance with the cutting parameter table, as following:
⑴
Solid particle: grade 1, 0.1~0.5μm particle can’t be more than 100pc, 0.5
～
5.0μm particle can’t be more than 1pc per
1CBM air
⑵
Temperature: grade 4, humidity pressure must be less or equal to 3
℃
⑶
Oil: grade 2, the density of the oil in air can’t be more than 0.1mg/m
3
4. Requirement of torch coolant
Before transportation, all coolant in the machine has been take out, customer need full fill proper coolant before
operation
Warnings:
Warning! The cooling liquid is irritant to skin and eyes, if wrongly eat or drink, it hurts even kills.
If skin and eyes contact with the coolant liquid, please wash immediately with lot of clean water, then go to the hospital
to ask for help.
Notice! Do not use the anti-freezing solution as the coolant, it hurt the torch! To protect the
bump and torch cooling system, please do use the special coolant liquid.

The working temperature of the coolant liquid of this system is -12
℃
~40
℃
The coolant box is empty when delivery out. Before fulling the coolant box, please check which coolant is suitable for
your environment. The standard coolant liquid of this cutting system is composed by 69.8% water, 30% propylene glycol
and 0.2% benzotriazole.
If working temperature is not in the range of -12
℃
~40
℃
, please check the suggestion of self-control mixed
coolant liquid below. To make the self-control mixed coolant liquid, please do use pure water in case of hurting the
cooling system.

The self-control mixed coolant liquid that used in low temperature (Under -12
℃
)
Notice! When the working temperature is lower than -12
℃
, the percentage composition of propylene glycol must
be improved. Or the frozen coolant may break the torch and pipes. Please reference to the below table for suitable
percentage composition of propylene glycol. However, the percentage composition of propylene glycol can not higher
than 50%.